as opposed to a "blue" room which might simulate the sky?
If he is happy with it, it doesn't matter what color it is.
a major design foul, is to do something you don't like.
you could always paint the ceiling blue...LOL But i used to have "antique planes" hanging in my boys room and their walls were beige... So if you like it and he likes it, You're golden...
Kids like all sorts of colors in all sorts of places....go with it !!! Have fun. The day when they are off on their own will come soon enough....repaint then!
PS...I just want to say that there is a lot of emphasis today on "style"! Forget style and think about substance! A house is for decorating, a home is for living and loving! There is a difference that too many people forget!
Let me add my experience from my own childhood. My Mom started giving me free reign on decorating my room as soon as I showed interest. From Pink and Orange to Pink and Red. Later when I moved to sisters larger room when she went off to college I wanted red walls so I could have a patriotic room. Back then you couldn't go to a store and buy real RED paint. Mom took the can back a number of times until there wasn't anymore room to add pigment. Though I have loads of awesome memories with my folks some of the fondest is of them allowing me to make choices at an early age. Gave me such wonderful confidence in myself.
Go for it!!!!!!! Maybe the green could be the grass....paint the top half blue with white clouds.....BUT only if he wants it....if not don't worry about it!!! He will probably want to change it as his interests change anyway!!!!
As a pilot, see nothing wrong with airplanes, just as long the baby cannot get in them and fly around. I would go for it. Heck if you get some real good ones, perhaps dad will be willing to change diapers if he can go in and play with them as well.